Question

perimeter of a semi circle of radius r_______​

Answer 1

The perimeter of a semicircle is the sum of the half of the circumference of the circle and diameter. As the perimeter of a circle is 2πr or πd. So, the perimeter of a semicircle is 1/2 (πd) + d or πr + 2r, where r is the radius.

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Answer 2

Answer:

1/2*2pie*r(radius)= pie*r

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